CN113556138A - Sensor feed system, sensor, radio signal transmitting device, and electronic apparatus - Google Patents
Sensor feed system, sensor, radio signal transmitting device, and electronic apparatus Download PDFInfo
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Abstract
The application discloses sensor feed system, sensor and radio signal transmitting device, this sensor feed system includes: a sensor chip and a feed network; the sensor chip comprises M radio frequency output ports; the feed network comprises M input ports and N output ports, wherein M and N are integers larger than or equal to 2, each input port of the feed network is connected with one corresponding radio frequency output port of the sensor chip, and each output port of the feed network is used for being connected with one transmitting antenna. The sensor feed system, the sensor and the radio signal transmitting device disclosed by the embodiment of the invention can realize that the power among the output channels of the sensor chip is synthesized to the same transmitting antenna, thereby improving the transmitting power of the transmitting antenna.
Description
Technical Field
The embodiment of the invention relates to a radio signal transmitting technology, in particular to a sensor feeding system, a sensor, a radio signal transmitting device and electronic equipment.
Background
For an antenna of a radio device, the transmission power of the antenna has a crucial influence on the performance of the radio device. For example, for a device performing target detection, the detection distance of the antenna is closely related to the transmission power, and a larger transmission power means a longer detection distance; also, for devices that communicate by radio, greater transmit power means greater communication distances.
With the increasing integration of electronic devices, radio devices have been highly integrated on a chip level, that is, one chip can perform processing such as mixing and amplification of radio frequency signals, and the radio frequency signals output by the chip can be directly connected to an antenna for signal transmission.
For a chip (e.g., a radar chip, a communication chip, etc.) having two or more rf output ports, each output port is typically connected to a transmitting antenna to form a radar transmission link. However, since the output power of the chip is limited, the total power of the transmission link formed by connecting the output port of each chip with the transmitting antenna is also limited, and thus, under the condition of high gain requirement, the design of the transmitting antenna is often provided with extremely high and even difficult-to-achieve index requirements.
Therefore, how to increase the gain of the transmitting antenna becomes a problem to be solved urgently at present.
Disclosure of Invention
The invention provides a sensor feed system, a sensor and a radio signal transmitting device, which improve the transmitting power of a transmitting antenna.
In a first aspect, an embodiment of the present invention provides a sensor feed system, including: a sensor chip and a feed network;
the sensor chip comprises M radio frequency output ports;
the feed network comprises M input ports and N output ports, wherein M and N are integers greater than or equal to 2, each input port of the feed network is connected with a corresponding radio frequency output port of the sensor chip, and each output port of the feed network is used for being connected with a transmitting antenna;
m multiplied by N feed circuits which are respectively connected with the M input ports and the N output ports are arranged between the M input ports and the N output ports of the feed network;
the output characteristics of the N feed lines from the same input port to the N output ports are equal in amplitude and have the same phase difference in sequence.
In a possible implementation manner of the first aspect, at least two radio frequency output ports of the sensor chip are used for outputting signals with the same frequency and the same power, and a specific phase difference exists between the ports, and a value of the specific phase difference is determined according to a structure of the feed network.
In a possible implementation manner of the first aspect, M is equal to N, and each output port is connected to a corresponding one of the rf output ports of the sensor chip, and each input port is configured to be connected to one of the transmitting antennas.
In a possible implementation manner of the first aspect, a Butler matrix feed network, a 3dB quadrature coupler, or a Nolen matrix feed network is provided between the M input ports and the N output ports.
In a second aspect, an embodiment of the present invention provides a sensor, including:
the sensor feed system according to any one of the possible implementations of the first aspect; and
n transmitting antennas;
wherein the sensor feed system is configured to feed any of the transmit antennas based on the outputs of at least two radio frequency output ports.
In a possible implementation manner of the second aspect, the sensor chip, the feeding network, and the N transmitting antennas are three devices independent from each other; alternatively, the first and second electrodes may be,
the feed network is integrated in the sensor chip to form an integrated device; or
The sensor chip, the feed network and the N transmitting antennas are integrated into an integral device.
In a possible implementation manner of the second aspect, when the sensor chip, the feeding network, and the N transmitting antennas are integrated into a unitary device, the unitary device is an AiP chip structure or a AoP chip structure.
In a third aspect, an embodiment of the present invention provides a radio signal transmitting apparatus, including:
the radio frequency module is provided with at least two signal output channels;
at least one transmitting antenna; and
the radio frequency module is connected with each transmitting antenna through the feed network;
the feed network is used for feeding any one of the transmitting antennas based on the outputs of the at least two signal output channels.
In a possible implementation manner of the third aspect, when any one of the transmitting antennas operates, at least two of the signal output channels are simultaneously turned on to feed the transmitting antenna through the feeding network.
In a possible implementation manner of the third aspect, when any one of the transmitting antennas operates, different phases exist between signals output by different paths of signal output channels that are simultaneously turned on, so that energy of signals output by each path of signal output channel is synthesized to the one transmitting antenna through the feeding network to perform signal transmission.
In a possible implementation manner of the third aspect, the feed network includes a Butler matrix feed network, a 3dB quadrature coupler, or a Nolen matrix feed network.
In a fourth aspect, an embodiment of the present invention provides an electronic device, including:
an apparatus body; and
the radio signal transmitting device according to any one of the possible implementations of the third aspect, provided on the apparatus body;
wherein the radio signal transmitting device is used for object detection and/or communication.
The embodiment of the invention provides a sensor feed system, a sensor and a sensor feed system of a radio signal transmitting device, the sensor and the radio signal transmitting device, which are composed of a sensor chip and a feed network, wherein the sensor chip comprises M radio frequency output ports, the feed network comprises M input ports and N output ports, M and N are integers which are more than or equal to 2, each input port of the feed network is connected with one corresponding radio frequency output port of the sensor chip, each output port of the feed network is used for being connected with one transmitting antenna, the radio frequency signals transmitted by the radio frequency output ports of a plurality of different sensor chips can be synthesized into one radio frequency signal and output through one transmitting antenna by controlling the different radio frequency output ports of the sensor chip to transmit the radio frequency signal with specific phase difference, and the power synthesis between the output channels of the sensor chip to the same transmitting antenna can be realized, thereby increasing the transmit power of the sensor feed system. The feed network provided by the embodiment of the invention has the advantages of simple structure and convenient design, and can effectively reduce the cost and save the space.
Drawings
Fig. 1 is a schematic structural diagram of a sensor feed system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a feed network according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another feeding network provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another feeding network provided in the embodiment of the present invention;
FIG. 5 is a schematic diagram of a Nolen matrix cell module;
fig. 6 is a schematic structural diagram of a sensor according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a sensor feeding system according to an embodiment of the present invention, and as shown in fig. 1, the sensor feeding system according to the embodiment includes: a sensor chip 11 and a feed network 12.
The sensor chip 11 includes M radio frequency output ports 13, M being an integer greater than or equal to 2. The sensor chip 11 may be any integrated chip for outputting radio frequency signals, the sensor chip 11 may include radio frequency processing functions for mixing, amplifying, etc. radio frequency signals, or the sensor chip 11 may further include the whole signal processing functions from baseband signal processing to radio frequency signal processing. The sensor chip 11 has at least two radio frequency output ports 13, that is, the sensor chip 11 is capable of outputting at least two radio frequency signals. The sensor chip 11 shown in fig. 1 only includes 4 rf output ports 13, that is, the sensor chip 11 only has the rf signal transmitting function, but the sensor chip 11 may also have the rf signal transceiving function at the same time, and since only the signal transmitting function is improved in the embodiment of the present invention, the receiving portion of the sensor chip 11 will not be shown.
In a traditional sensor feed system, if a sensor chip with multiple radio frequency output ports is adopted, each radio frequency output port of the sensor chip is directly connected with one transmitting antenna, that is, the radio frequency output ports of the sensor chip and the transmitting antennas are in one-to-one correspondence, so that radio frequency channels with the same number as the radio frequency output ports of the sensor chip are formed. However, the gain of each rf channel is determined only by the transmitting power of the sensor chip and the gain of the transmitting antenna, and it is difficult to achieve a high gain.
In the embodiment, the feed network 12 is added behind the sensor chip 11 in the proposed sensor feed system, the sensor chip 11 is connected with the transmitting antenna 16 through the feed network 12, and the gain of the sensor feed system can be improved through the design of the feed network 12.
The feed network 12 includes M input ports 14 and N output ports 15, where M and N are integers greater than or equal to 2, each input port 14 is connected to one rf output port 13 of the sensor chip 11, and each output port 15 is used for being connected to one transmitting antenna 16. That is, each input port 14 of the feeding network 12 is connected to a corresponding one of the rf output ports 13 of the sensor chip 11, and each output port 15 of the feeding network 12 is connected to a transmitting antenna 16. In this embodiment, M and N are both 4.
Between the M input ports 14 and the N output ports 15 of the feeding network 12, M × N (i.e., 16) feeding lines 17 are included, which connect the M input ports and the N output ports, respectively. I.e. each input port 14 and each output port 15 of the feeding network 12 are connected by a feeding line 17.
In an alternative embodiment, the N feeding lines 17 from the same input port 14 to the N output ports 15 of the feeding network 12 have the same amplitude and sequentially have the same phase difference, that is, for the signal input from the same input port 14, the signals output from the N output ports 15 have the same amplitude and sequentially have the same phase difference. For example, in the sensor feed system shown in fig. 1, M and N are both 4, and the signal input from one input port 14 is output at each output port 15 with the same amplitude and phase difference of 45 ° in sequence.
After the sensor feed system shown in fig. 1 is adopted, when the plurality of rf output ports 13 of the sensor chip 11 transmit signals at the same time, the phases of the signals transmitted by the plurality of rf output ports 13 of the sensor chip 11 can be adjusted, so that the signals output by the plurality of rf output ports 13 are output by the same output port 15 after passing through the feed network 12, and thus the signals output by the plurality of rf output ports 13 are synthesized into the same rf signal, thereby achieving the purpose of improving the transmission gain of the sensor feed system. According to the principle of rf signal synthesis, if two identical rf signals are synthesized, the gain will be increased by 3dB, if three identical rf signals are synthesized, the gain will be increased by 4.77dB, and if four identical rf signals are synthesized, the gain will be increased by 6dB, that is, the sensor feed system shown in fig. 1 can provide a maximum gain of 6 dB. Theoretically, for the sensor chip 11 with M rf output ports 13, the gain of the transmission power can be improved by 10log (M) dB at most compared with that of a single antenna connected with a single output channel after passing through the feed network.
In an embodiment, in order to enable the sensor feeding system provided by the embodiment of the present invention to correctly realize the synthesis of multiple radio frequency signals, at least two radio frequency output ports 13 of the sensor chip 11 may output signals with the same frequency and power and have a specific phase difference between the ports, and a value of the specific phase difference is determined according to a structure of the feeding network 12. For example, at least two rf output ports 13 of the sensor chip 11 may output the same frequency, the same power, and the phase difference between the input port 14 connected to the at least two rf output ports 13 and the target output port, which is the output port 15 connected to the transmitting antenna 16 to be transmitted. That is, in order to improve the gain of the sensor feed system and correctly realize the synthesis of the multiple radio frequency signals sent by the sensor chip 11, the transmitting antenna 16 to be transmitted needs to be determined first, and after the transmitting antenna 16 to be transmitted is determined, the output port 15 of the feed network 12 is determined, that is, the target output port. Then, according to the required gain, the rf output port 13 of the sensor chip 11 for transmitting is determined, for example, the antenna gain is removed, two rf output ports 13 of the sensor chip 11 can be selected if the required additional gain is about 3dB, and all four rf output ports 13 of the sensor chip 11 are required if the required gain is 6 dB. After the radio frequency output ports 13 for transmitting by the sensor chip 11 are determined, the phase difference between the radio frequency signals transmitted by the radio frequency output ports 13 can be determined according to the determined phase difference between the input port 14 connected to the radio frequency output port 13 for transmitting and the target output port. Then, the determined rf output ports 13 on the sensor chip 11 can be controlled to simultaneously transmit rf signals with the same frequency, the same power, and the determined phase difference. Thus, the radio frequency signals transmitted by the plurality of radio frequency output ports 13 are combined into one radio frequency signal at the target output port, and the radio frequency signal is transmitted through the transmitting antenna 16 connected with the target output port, so that the gain of the sensor feed system can be improved.
It should be noted that, when the number of the input ports 14 and the output ports 15 of the feeding network 12 is the same, that is, M is equal to N, the input ports 14 and the output ports 15 of the feeding network 12 may be interchanged. I.e. each output port 15 is connected to one radio frequency output port 13 of the sensor chip 11 and each input port 14 is adapted to be connected to one transmitting antenna 16. After the exchange, the phase difference value required for the synthesis of the radio frequency output port 13 from which the transmission is performed may change in order to perform the synthesis.
The sensor feed system provided by the embodiment of the invention comprises a sensor chip and a feed network, wherein the sensor chip comprises M radio frequency output ports, the feed network comprises M input ports and N output ports, M and N are integers greater than or equal to 2, each input port of the feed network is connected with one corresponding radio frequency output port of the sensor chip, each output port of the feed network is used for being connected with one transmitting antenna, M multiplied by N feed circuits which are respectively connected with the M input ports and the N output ports are arranged between the M input ports and the N output ports, the output characteristics of the N feed circuits from the same input port to the N output ports are equal in amplitude and have the same phase difference in sequence, and the radio frequency signals transmitted by the radio frequency output ports of different sensor chips are controlled to transmit the radio frequency signals with the specific phase difference, so that the radio frequency signals transmitted by the radio frequency output ports of different sensor chips are combined into one radio frequency signal and the radio frequency signal is combined into one radio frequency signal The power between the output channels of the sensor chip can be synthesized to the same transmitting antenna through the output of one transmitting antenna, so that the transmitting power of a sensor feed system is improved. The feed network provided by the embodiment of the invention has the advantages of simple structure and convenient design, and can effectively reduce the cost and save the space.
There are various ways to implement the feeding network in the sensor feeding system shown in fig. 1, and the sensor feeding system provided in the embodiment of the present invention is further described in detail below with specific structures of multiple feeding networks.
Fig. 2 is a schematic structural diagram of a feed network provided in an embodiment of the present invention, and as shown in fig. 2, the feed network provided in this embodiment is a Butler matrix-based feed network. In this embodiment, a 4 × 4 Butler matrix feed network will be described.
In fig. 2, the Butler matrix has four input ports 21, 22, 23 and 24 and four output ports 25, 26, 27 and 28. The quadrature coupler, the 45 ° phase shifter and the cross-over junction shown in the figure are all one implementation of a Butler matrix feed network. When the Butler matrix feed network shown in fig. 2 operates in the power distribution state, the relative phase difference of each port is shown in table 1.
TABLE 1
As can be seen from table 1, when any one of the input ports 21, 22, 23, and 24 is fed with power, the output ports 25, 26, 27, and 28 will obtain signals with equal amplitude and equal phase difference. The Butler matrix also has a power synthesis method, and the relationship between the input phase configuration and the output port of the matrix is shown in table 2, where phi is an arbitrary angle value. If the Butler matrix feed network shown in fig. 2 is connected to a sensor chip having 4 rf output ports and 4 transmitting antennas, where the input port 21, the input port 22, the input port 23, and the input port 24 are respectively connected to the 4 rf output ports of the sensor chip, the output port 25, the output port 26, the output port 27, and the output port 28 are respectively connected to the 4 transmitting antennas, and by configuring different phases output by the 4 rf output ports of the sensor chip, it is possible to implement that all powers flow to different transmitting antennas.
TABLE 2
This connection can be achieved by combining all the energy into the output of the transmitting antenna connected to the input port 25 when the phase difference between the signal input by the sensor chip connected to the input port 22, the input port 23 and the input port 24 and the signal input by the sensor chip connected to the input port 21 is 90 °, 45 ° and 135 °, respectively; when the phase difference between the signals input by the sensor chips connected to the input port 22, the input port 23 and the input port 24 and the phase difference between the signals input by the sensor chips connected to the input port 21 are respectively-90 °, 135 ° and 45 °, all the energy is synthesized to the transmitting antenna connected to the input port 26 for output; when the phase difference between the signal input by the sensor chip connected to the input port 22, the input port 23, and the input port 24 and the signal input by the sensor chip connected to the input port 21 is 90 °, -135 °, -45 °, all the energy is synthesized to the output of the transmitting antenna connected to the input port 27; when the signals input by the sensor chips connected to the input port 22, the input port 23, and the input port 24 and the signals input by the sensor chips connected to the input port 21 have phase differences of-90 °, -45 °, -135 °, respectively, all the energy is synthesized to the output of the transmitting antenna connected to the input port 28.
In addition, the Butler matrix feed network shown in fig. 2 may also be reversely connected, that is, input ports and output ports are swapped, each output port is connected to a corresponding radio frequency output port of the sensor chip, and each input port is used for being connected to one transmitting antenna, in this case, the number of the input ports and the output ports of the feed network is required to be the same, that is, M is equal to N. Specifically, the input port 21, the input port 22, the input port 23, and the input port 24 are respectively connected to 4 transmitting antennas, and the output port 25, the output port 26, the output port 27, and the output port 28 are respectively connected to 4 rf output ports of the sensor chip. All power flows to different transmitting antennas can be realized by configuring different phases output by 4 radio frequency output ports of the sensor chip. The relationship between the input phase configuration and the output port of the sensor chip connected to different input ports in this connection mode is shown in table 3, where Φ is an arbitrary angle value.
TABLE 3
This connection is achieved by combining all the energy into the output of the transmitting antenna connected to the input port 21 when the phase difference between the signal input by the sensor chip connected to the input port 26, the input port 27 and the input port 28 and the signal input by the sensor chip connected to the input port 25 is 45 °, 90 ° and 135 °, respectively; when the phase difference between the signals input by the sensor chips connected to the input ports 26, 27 and 28 and the signals input by the sensor chips connected to the input ports 25 is-135 °, -270 °, -405 °, all the energy is synthesized to the output of the transmitting antenna connected to the input port 22; when the phase difference between the signal input by the sensor chip connected to the input port 26, the input port 27, and the input port 28 and the signal input by the sensor chip connected to the input port 25 is 135 °, 270 °, and 405 °, respectively, all the energy is synthesized to the output of the transmitting antenna connected to the input port 23; when the signals input by the sensor chips connected to the input ports 26, 27 and 28 and the signals input by the sensor chips connected to the input ports 25 have phase differences of-45 °, -90 °, -135 °, respectively, all the energy is synthesized to the output of the transmitting antenna connected to the input port 24.
Fig. 3 is a schematic structural diagram of another feeding network according to an embodiment of the present invention, and as shown in fig. 3, the feeding network according to the embodiment is a feeding network based on a 3dB quadrature coupler (referred to as a quadrature coupler for short), which is described below.
As shown in fig. 3, the quadrature coupler has only 2 input ports and 2 output ports, the input port 31 and the input port 32 are respectively connected to 2 rf output ports of the sensor chip, and the output port 33 and the output port 34 are respectively connected to two transmitting antennas.
Different phases are configured at the radio frequency output ports of the sensor chips connected with the input ports 31 and 32, and all energy is output at the output ports 33 and 34. The phase configuration of the quadrature coupler is shown in table 4. When the radio frequency output ports of the sensor chips connected with the input port 31 and the input port 32 are opened together, and the radio frequency output port connected with the input port 31 is configured with 0 degrees and the radio frequency output port connected with the input port 32 is configured with 90 degrees of phase, all energy flows to the transmitting antenna connected with the output port 33 through the orthogonal coupler; when the rf output ports of the sensor chips connected to the input ports 31 and 32 are opened together, and the rf output port connected to the input port 31 is configured with 90 ° and the rf output port connected to the input port 32 is configured with 0 ° phase, all energy flows to the transmitting antenna connected to the output port 34 through the quadrature coupler, thereby increasing the transmitting power of the corresponding transmitting antenna.
TABLE 4
Fig. 4 is a schematic structural diagram of another feed network provided in an embodiment of the present invention, and as shown in fig. 4, the feed network provided in this embodiment is a feed network based on a Nolen matrix. In the present embodiment, a Nolen matrix feeding network of M × N will be described.
The Nolen matrix is composed of a plurality of unit matrix modules 41, the structure of each unit matrix module 41 is shown in fig. 5, fig. 5 is a schematic structural diagram of a Nolen matrix unit module, and the M × N unit matrix modules 41 shown in fig. 5 constitute the whole M × N Nolen matrix feed network. In the single matrix cell module 41 shown in fig. 5, two parts, a coupler and a phase shifter, are includedijThe input energy will be in bijAnd ai(j+1)Output, bi(j+1)For isolating the ports, there is no energy output in the ideal state; similarly, by bi(j+1)The input energy will be in bijAnd ai(j+1)And (6) outputting. In addition, bijThere will be a phase shifter, bijPort output rephased phiij。
A in FIG. 41-aMInput ports for a Nolen matrix feed network, b1-bNIs the output port of the feed network of the Nolen matrix. Similar to the Butler matrix shown in fig. 2, when the sensor chip turns on the L paths (L is equal to or less than M), and the L paths are configured with specific phases, all energy can flow to the transmitting antenna connected to a certain output port, and when different phase groups are configured, all energy can flow to the transmitting antennas connected to different output ports, so that the transmitting power of the antenna is improved.
In addition, in addition to the matrix form of the coupler and the phase shifter of fig. 2 to 4 to enhance the transmission power of the antenna, the Rotman lens has a property similar to that of a Butler matrix, that is, an input port, and an output port with a constant amplitude and phase difference, and can be implemented by a planar Rotman lens based on a Printed Circuit Board (PCB) such as a microstrip, a stripline, a slotline, and a waveguide type Rotman lens with an all-metal structure. Similar to the Butler matrix in the embodiment shown in fig. 2, the Rotman lens is used in reverse, the output terminal is connected with the sensor chip, the input terminal of the Rotman lens is connected with the corresponding transmitting antenna, and the Rotman lens can realize the enhancement of the transmitting power of the antenna by configuring the phase of the input terminal.
Further, in each of the above embodiments, the sensor chip in the sensor feeding system may be a millimeter wave radar chip.
Fig. 6 is a schematic structural diagram of a sensor according to an embodiment of the present invention, and as shown in fig. 6, the sensor according to the embodiment of the present invention includes a sensor feeding system 61 and N transmitting antennas 62. The structure of the sensor feed system 61 is shown in fig. 1. The sensor feed system 61 is operable to feed either of the transmit antennas 62 based on the output of at least two radio frequency output ports.
The structure and the operation principle of the sensor provided in this embodiment have been described in detail in the embodiment shown in fig. 1, and are not described herein again. It should be noted that the sensor provided in the embodiment of the present invention may operate in a millimeter wave frequency band.
Further, on the basis of the embodiment shown in fig. 6, the sensor chip 11, the feeding network 12 and the N transmitting antennas 62 in the sensor feeding system 61 are three devices independent from each other; or, the feeding network 12 is integrated in the sensor chip 11 to form an integrated device; or the sensor chip 11, the feeding network 12 and the N transmitting antennas 62 are integrated into a single device.
Further, on the basis of the embodiment shown in fig. 6, when the sensor chip 11, the feeding network 12 and the N transmitting antennas 62 are integrated into a single device, the single device has an AiP chip structure or an AoP chip structure.
Further, on the basis of the embodiment shown in fig. 6, at least two rf output ports of the sensor chip are used to output a phase difference between an input port connected to the at least two rf output ports and a target output port connected to a transmitting antenna to be transmitted, where the frequency is the same, the power is the same, and the phase difference is the phase difference between the input port and the target output port.
Further, on the basis of the embodiment shown in fig. 6, M is equal to N, and each output port is connected to a corresponding one of the rf output ports of the sensor chip, and each input port is used for connecting to one of the transmitting antennas.
Further, on the basis of the embodiment shown in fig. 6, a Butler matrix feed network is arranged between the M input ports and the N output ports.
Further, on the basis of the embodiment shown in fig. 6, 3dB quadrature couplers are arranged between the M input ports and the N output ports.
Further, on the basis of the embodiment shown in fig. 6, a Nolen matrix feeding network is arranged between the M input ports and the N output ports.
An embodiment of the present invention further provides a radio signal transmitting apparatus, including: the radio frequency module is provided with at least two signal output channels; at least one transmitting antenna; the radio frequency module is connected with each transmitting antenna through the feed network; the feed network is used for feeding any one of the transmitting antennas based on the outputs of the at least two signal output channels.
Compared with the conventional radio signal transmitting device that feeds one transmitting antenna through the output of one signal output channel, the radio signal transmitting device provided in this embodiment feeds the same transmitting antenna through the output of at least two signal output channels (such as two signal output channels, three signal output channels, or four signal output channels, etc.), and can effectively increase the transmitting power of the transmitting antenna. When the radio signal transmitting device provided by the embodiment adopts one signal output channel to feed one transmitting antenna, the traditional technical scheme is realized, and the radio signal transmitting device can be suitable for scenes with low transmission power requirements; when the radio signal transmitting apparatus provided in this embodiment needs to increase the transmission power, one transmitting antenna may be fed based on at least two signal output channels, so as to increase the transmission power of part or all of the transmitting antennas.
Further, when any one of the transmitting antennas of the radio signal transmitting apparatus provided in the embodiment of the present invention operates, at least two of the signal output channels are simultaneously turned on to feed the one transmitting antenna through the feeding network. This can boost the transmit power of all transmit antennas.
Further, when any one of the transmitting antennas of the radio signal transmitting apparatus provided in the embodiment of the present invention operates, different phases exist between signals output by different paths of signal output channels that are simultaneously turned on, so that energy of signals output by each path of signal output channel is synthesized to the one transmitting antenna through the feeding network to perform signal transmission.
Further, the feed network in the radio signal transmitting apparatus provided in the embodiment of the present invention includes a Butler matrix feed network, a 3dB quadrature coupler, or a Nolen matrix feed network.
An electronic device, comprising:
the embodiment of the invention also provides the electronic equipment, which comprises an equipment body; and a radio signal transmitting device disposed on the device body; wherein the radio signal transmitting device is used for object detection and/or communication. The radio signal transmitting apparatus may be the radio signal transmitting apparatus shown in the foregoing embodiments.
The radio signal transmitting device may be disposed outside the apparatus body, and in another embodiment of the present application, the radio signal transmitting device may be disposed inside the apparatus body, and in another embodiment of the present application, the radio signal transmitting device may be disposed partly inside the apparatus body and partly outside the apparatus body. The present application is not limited thereto, as the case may be.
It should be noted that the radio signal transmitting apparatus may also have functions of signal receiving and signal processing, that is, functions such as object detection and communication may be realized by transmitting and receiving signals.
In an alternative embodiment, the device body may be a component and a product applied to fields such as smart home, transportation, smart home, consumer electronics, monitoring, industrial automation, in-cabin detection, health care, and the like; for example, the device body can be an intelligent transportation device (such as an automobile, a bicycle, a motorcycle, a ship, a subway, a train and the like), a security device (such as a camera), a liquid level/flow rate detection device, an intelligent wearing device (such as a bracelet, glasses and the like), an intelligent household device (such as a television, an air conditioner, an intelligent lamp and the like), various communication devices (such as a mobile phone, a tablet computer and the like), a barrier gate, an intelligent transportation indicator lamp, an intelligent indicator board, a transportation camera, various industrial manipulators (or robots) and the like, and various instruments for detecting vital sign parameters and various devices carrying the instruments. The radio device may be a radio device as set forth in any embodiment of the present application, and the structure and the operation principle of the radio device have been described in detail in the above embodiments, which are not described in detail herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. A sensor feed system, comprising: a sensor chip and a feed network;
the sensor chip comprises M radio frequency output ports;
the feed network comprises M input ports and N output ports, M and N are integers greater than or equal to 2, each input port of the feed network is connected with a corresponding radio frequency output port of the sensor chip, and each output port of the feed network is used for being connected with a transmitting antenna;
m multiplied by N feeder circuits respectively connected with the M input ports and the N output ports are arranged between the M input ports and the N output ports; and
the output characteristics of the N feed lines from the same input port to the N output ports are equal in amplitude and have the same phase difference in sequence.
2. The sensor feed system of claim 1, wherein at least two rf output ports of the sensor chip are configured to output signals with the same frequency and the same power, and have a specific phase difference between the ports, and the value of the specific phase difference is determined according to the structure of the feed network.
3. The sensor feed system of claim 1 or 2, wherein M is equal to N, and each output port is connected to a respective one of the rf output ports of the sensor chip, each input port being adapted for connection to a transmitting antenna.
4. The sensor feed system of claim 1 or 2, wherein a Butler matrix feed network, a 3dB quadrature coupler, or a Nolen matrix feed network is between the M input ports and the N output ports.
5. The sensor feed system of any of claims 1-4, wherein the sensor chip is a millimeter wave radar chip.
6. A sensor, comprising:
the sensor feed system of any one of claims 1-5; and
n transmitting antennas;
wherein the sensor feed system is configured to feed any of the transmit antennas based on the outputs of at least two radio frequency output ports.
7. The sensor of claim 6, wherein the sensor chip, the feed network, and the N transmit antennas are three devices independent of each other; alternatively, the first and second electrodes may be,
the feed network is integrated in the sensor chip to form an integrated device; or
The sensor chip, the feed network and the N transmitting antennas are integrated into an integral device.
8. The sensor of claim 7, wherein the sensor chip, the feed network, and the N transmit antennas are integrated into a single device having either an AiP chip structure or a AoP chip structure.
9. A radio signal transmitting apparatus, comprising:
the radio frequency module is provided with at least two signal output channels;
at least one transmitting antenna; and
the radio frequency module is connected with each transmitting antenna through the feed network;
the feed network is used for feeding any one of the transmitting antennas based on the outputs of the at least two signal output channels.
10. The apparatus according to claim 9, wherein when any one of the transmitting antennas is operating, at least two of the signal output channels are simultaneously turned on to feed the one transmitting antenna through the feeding network.
11. The apparatus according to claim 9, wherein when any one of the transmitting antennas operates, the signals output by different paths of signal output channels that are simultaneously turned on have different phases, so that energy of signals output by each path of signal output channel is combined to the one transmitting antenna through the feeding network for signal transmission.
12. The apparatus of any of claims 9-11, wherein the feed network comprises a Butler matrix feed network, a 3dB quadrature coupler, or a Nolen matrix feed network.
13. An electronic device, comprising:
an apparatus body; and
the radio signal transmitting apparatus according to any one of claims 9 to 12 provided on the device body;
wherein the radio signal transmitting device is used for object detection and/or communication.
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